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MHD activity triggered by monster sawtooth crashes on Tore Supra

机译：怪物锯齿在Tore Supra上触发的MHD活动

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The crash of monster sawteeth in Tore Supra ion cyclotron resonance heated plasmas is observed to trigger long-lived magneto hydrodynamic (MHD) activity, dominated by a (m = 3, n = 2) magnetic perturbation at the edge. This phenomenon is reminiscent of the triggering of neoclassical tearing modes, although in Tore Supra the MHD activity decays and eventually vanishes. It can be explained by the linear destabilization of the (3,2) mode as the current sheet developed in the non-linear stage of the internal kink relaxation gets closer to q = 3/2. However, the lifetime of the (3,2) island is longer than the period of linear instability. We find that the neoclassical drive is essential for explaining the observed lifetime and width of the island, although the overall dynamics is controlled by the relaxation of the current profile on a resistive time scale.
机译：观察到Tore Supra离子回旋共振加热的等离子体中的怪物锯齿崩溃会触发长寿命的磁流体动力学（MHD）活动，该活动主要由边缘的（m = 3，n = 2）磁扰动引起。这种现象使人想起了新古典主义的催泪模式，尽管在《 Tore Supra》中，MHD活动逐渐减弱并最终消失。这可以用（3,2）模式的线性不稳定来解释，因为在内部纽结松弛的非线性阶段形成的电流表接近q = 3/2。但是，（3,2）岛的寿命比线性不稳定性的周期更长。我们发现，新古典驱动对于解释观察到的岛的寿命和宽度至关重要，尽管整体动力学是由电阻时标上电流分布的松弛控制的。

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